Table of Contents: Modern building materials; And underground quarry; At the Dallas and Cleveland expositions; The showcase of an industry; Electricks with Cellophane; Protective panes of Plastacele; Preserving food in 7,000,000 homes; Beauty aids;...

Table of Contents: Coal Conservation a National Problem; Road Building Under Difficulties; The Romance of Stone; The Making of Artificial Leather; Conserve the Food Supply by Conserving the Game; King Cotton Enlarges his Domain; Roadway Maintenance...